1331003321 has 8 divisors (see below), whose sum is σ = 1454759424. Its totient is φ = 1212298560.

The previous prime is 1331003299. The next prime is 1331003327. The reversal of 1331003321 is 1233001331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1331003321 - 2¹⁰ = 1331002297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331003321.

It is not an unprimeable number, because it can be changed into a prime (1331003327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262285 + ... + 1263338.

It is an arithmetic number, because the mean of its divisors is an integer number (181844928).

Almost surely, 2^1331003321 is an apocalyptic number.

It is an amenable number.

1331003321 is a deficient number, since it is larger than the sum of its proper divisors (123756103).

1331003321 is a wasteful number, since it uses less digits than its factorization.

1331003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525671.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1331003321 is about 36482.9182083890. The cubic root of 1331003321 is about 1100.0009148753. Note that the first 3 decimals are identical.

Adding to 1331003321 its reverse (1233001331), we get a palindrome (2564004652).

The spelling of 1331003321 in words is "one billion, three hundred thirty-one million, three thousand, three hundred twenty-one".